3123
This number is a composite.
 23 31's followed by 31 23's is prime.  [De Geest]
 
23 31's followed by 31 23's is prime.  [De Geest]
 3123 is the sum of the fourth powers of the first four prime numbers.
 
3123 is the sum of the fourth powers of the first four prime numbers. 
Printed from the PrimePages <t5k.org> © G. L. Honaker and Reginald McLean
This number is a composite.
 23 31's followed by 31 23's is prime.  [De Geest]
 
23 31's followed by 31 23's is prime.  [De Geest]
 3123 is the sum of the fourth powers of the first four prime numbers.
 
3123 is the sum of the fourth powers of the first four prime numbers.